diff --git a/MD/MembraneLook/requirements.txt b/MD/MembraneLook/requirements.txt
index 43e2603..2518a9f 100644
--- a/MD/MembraneLook/requirements.txt
+++ b/MD/MembraneLook/requirements.txt
@@ -354,7 +354,7 @@ urllib3==1.24.1
 virtualenv==16.0.0
 vpnotebook==0.1.3
 vpython==7.4.7
-vtk==8.1.1
+vtk==9.0.1
 wcwidth==0.1.7
 webencodings==0.5.1
 Werkzeug==0.14.1